149 layout

so here is the, diagram of the building which I hope to do this fall. Note, the new exterior wall will house the plant i.e. eletrical, plumbing, drain, tel-com, h20 and swage..... on the out side, there will be gravel next to the building which can be removed, for access, but i want access panels every 20 ft up and down the out side alley
note this POV is from concrete side of the building
note structure @ right is property next store
not to scale
for planning and design only